/**
 * Copyright 2014
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 * 
 * @project loon
 * @author cping
 * @email：javachenpeng@yahoo.com
 * @version 0.4.1
 */
package loon.action.map.colider;

public class IsometricTileColider extends TileColider {

	public IsometricTileColider(int tileWidth, int tileHeight) {
		super(tileWidth, tileHeight);
	}

	@Override
	public boolean colideTile(Tile tile, int mx, int my, int offsetX, int offsetY) {
		
		return colideIsometric(tile, mx, my, offsetX, offsetY);
	}
	
	private boolean colideIsometric(Tile tile, int px, int py, int offsetX, int offsetY) {

		int x = px-tile.getX()-offsetX;
		int y = py-tile.getY()-offsetY;
		
		int my = tile.getHeight()/2;
		int mx = tile.getWidth()/2;

		if(y > my){
			y = my-(y-my);
		}
		
		return !((x > mx+1+(2*y)) || (x < mx-1-(2*y)));

	}

}
